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Water Quality and the Nitrogen Cycle

Water Quality and the Nitrogen Cycle

Assessment

Presentation

Science

Vocational training

Practice Problem

Hard

Created by

Stephanie Davies

FREE Resource

30 Slides • 19 Questions

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Multiple Choice

Which of the following is NOT a reason why water quality is important for fish?

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Affects health of fish

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Increases chance of disease

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Increases mortality rate

4

Improves fish color instantly

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Open Ended

Explain why it is important to monitor multiple parameters such as temperature, pH, and ammonia levels in an aquarium.

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Fill in the Blank

Coldwater fish are generally kept in the temperature range of ___°C.

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Fill in the Blank

A pH reading of ___ is considered neutral for aquarium water.

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Multiple Select

Which of the following are ways to measure water parameters in an aquarium?

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Thermometer

2

Water test kits

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Electronic probes

4

Visual inspection

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Multiple Choice

Which minerals are primarily responsible for water hardness in aquariums?

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Calcium, magnesium, and carbonate

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Sodium and potassium

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Iron and copper

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Chlorine and fluoride

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Multiple Select

Which of the following are possible consequences of incorrect salinity in a saltwater aquarium?

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Physiological stress in fish

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Lowered immune function

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Increased plant growth

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Improved fish coloration

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Open Ended

How do you think water quality might be connected to the nitrogen cycle?

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Open Ended

Describe how plants contribute to the nitrogen cycle in an aquarium.

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Multiple Choice

What is the main role of Nitrosomonas bacteria in the nitrogen cycle of an aquarium?

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Convert ammonia to nitrite

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Convert nitrite to nitrate

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Remove carbon dioxide

4

Produce oxygen

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Multiple Choice

What is the correct order of nitrogen compounds as bacteria break down waste in an aquarium?

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Ammonia → Nitrite → Nitrate

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Nitrate → Nitrite → Ammonia

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Nitrite → Ammonia → Nitrate

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Nitrate → Ammonia → Nitrite

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Multiple Select

Which of the following are causes of ammonia buildup in an aquarium?

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Decomposition of fish waste

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Decaying food

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Dead fish

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Photosynthesis

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Multiple Choice

Which of the following is NOT an effect of ammonia on fish health?

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Improved oxygen transport in blood

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Destruction of mucous membranes

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Damage to gill membranes

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Reduced hatch and growth rates

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Open Ended

Describe two visible signs that a fish in an aquarium might be suffering from ammonia poisoning.

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Multiple Choice

What role do nitrifying bacteria play in the nitrogen cycle of an aquarium?

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They convert ammonia to nitrite and nitrite to nitrate

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They produce ammonia from nitrate

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They remove oxygen from water

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They increase the toxicity of aquarium water

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Multiple Select

Which of the following are effects of nitrite on fish health?

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Gasping and rapid gill movements

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Brown blood disease

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Improved immune system

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Death

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Fill in the Blank

Nitrite is converted to nitrate by the bacteria ___ in the biological filter.

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Open Ended

Compare the toxicity and effects of nitrate (NO3) and nitrite (NO2) on fish health.

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Multiple Select

Which of the following are recommended practices to reduce risks in a new aquarium?

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Add many fish at once and feed heavily

2

Test water regularly and perform water changes

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Obtain gravel or filter media from a mature tank

4

Ignore ammonia and nitrite levels

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